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[bug #56390] Fetches (e.g. HTTP) fail from dual-stacked hosts
From: |
Faidon Liambotis |
Subject: |
[bug #56390] Fetches (e.g. HTTP) fail from dual-stacked hosts |
Date: |
Sat, 25 May 2019 22:02:38 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0 |
URL:
<https://savannah.gnu.org/bugs/?56390>
Summary: Fetches (e.g. HTTP) fail from dual-stacked hosts
Project: GNU GRUB
Submitted by: paravoid
Submitted on: Sun 26 May 2019 02:02:36 AM UTC
Category: Network
Severity: Major
Priority: 5 - Normal
Item Group: Software Error
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release:
Release: Git master
Reproducibility: Every Time
Planned Release: None
_______________________________________________________
Details:
Assuming:
- GRUB has an IPv4 or IPv6 address (but not both)
- We want to fetch something from example.org (e.g. (http,example.org)/linux)
- example.org is dual-stacked, i.e. has both A and AAAA DNS records
One every N fetches will fail, at random.
Easily reproducible using nslookup, where it returns either the A or the AAAA,
basically at random:
grub> net_nslookup example.org
93.184.216.34
grub> net_nslookup example.org
93.184.216.34
grub> net_nslookup example.org
2606:2800:220:1:248:1893:25c8:1946
grub> net_nslookup example.org
93.184.216.34
grub> net_nslookup example.org
2606:2800:220:1:248:1893:25c8:1946
grub> net_nslookup example.org
93.184.216.34
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